[P-EM12] Coupling Processes in the Atmosphere-Ionosphere System

[PEM12-24] On the Development of Lifting the Lid of the GEOS5 Atmospheric General Circulation Model (AGCM)

*Joshua Pettit^1,2、Guiping Liu²、Fabrizio Sassi²、Ruth Lieberman²、William Putman² (1.George Mason University、2.NASA Goddard Space Flight Center)

The Goddard Earth Observing System model (GEOS) Version 5 is the National Aeronautics and Space Administration’s next-generation global atmospheric model. GEOS5 has the flexibility to be used as a weather forecasting model as well as a coupled-climate model with various horizontal resolutions ranging from 2° down to 0.25°. GEOS5’s intrinsic vertical extent is from the surface to 0.01 hPa. Here we present initial results of a new fork of GEOS5 Atmospheric General Circulation Model that extends the model top from 0.01 hPa (75 km) to 0.0001 hPa (120 km) called GEOS5-MLT. This extension will give GEOS5 a fully resolved mesosphere, which is the conduit for gravity waves generated from the troposphere to reach the upper atmosphere. Our results focus on gravity waves, both resolved and parameterized using different horizontal resolutions and their resulting impact on the mesosphere/lower thermosphere.